189089992 has 96 divisors (see below), whose sum is σ = 457087680. Its totient is φ = 71406720.

The previous prime is 189089981. The next prime is 189089993. The reversal of 189089992 is 299980981.

It is not an unprimeable number, because it can be changed into a prime (189089993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384867 + ... + 385357.

It is an arithmetic number, because the mean of its divisors is an integer number (4761330).

Almost surely, 2^189089992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189089992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228543840).

189089992 is an abundant number, since it is smaller than the sum of its proper divisors (267997688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189089992 is a wasteful number, since it uses less digits than its factorization.

189089992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 189089992 is about 13750.9996727511. Note that the first 3 decimals coincide. The cubic root of 189089992 is about 573.9704242431.

It can be divided in two parts, 18908 and 9992, that added together give a square (28900 = 170²).

The spelling of 189089992 in words is "one hundred eighty-nine million, eighty-nine thousand, nine hundred ninety-two".